Any development or enlargement that does not meet the location and floor area criteria of paragraph (a) of Section 23-65 and includes a tower shall be constructed as a standard tower in accordance with the regulations set forth in this Section.

At all levels, a tower shall be located not less than 15 feet from the street line of a narrow street and not less than 10 feet from the street line of a wide street.

Unenclosed balconies, subject to the provisions of Section 23-13 (Balconies), are permitted to project into or over open areas not occupied by towers.